Physics – Plasma Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h...2k&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 8, pp. 2-1, CiteID 1161, DOI 10.1029/2001GL014524
Physics
Plasma Physics
2
Space Plasma Physics: Radiation Processes, Space Plasma Physics: Waves And Instabilities, Space Plasma Physics: Nonlinear Phenomena, Interplanetary Physics: Plasma Waves And Turbulence, Interplanetary Physics: Planetary Bow Shocks
Scientific paper
We present the first quantitative theoretical results for the spatial distribution and flux levels of fundamental (fp) and second harmonic (2fp) plasma radiation generated in Earth's foreshock by beam-driven Langmuir waves. The theory predicts that both the fp and 2fp source regions typically extend over several hundred Earth radii (RE) along the tangent magnetic field line. In the direction perpendicular to the magnetic tangent, however, the source regions are more localized, with the peak emission confined to <~10RE for 2fp radiation and <~1RE for fp radiation. The flux levels predicted by our model are in close agreement with the levels measured in situ by various spacecraft, with typical values ~10-14W m-2 for 2fp radiation. The fp flux densities are typically 2-3 orders of magnitude lower.
Cairns Iver H.
Knock Stuart
Kuncic Zdenka
Robinson Adam P.
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